Influence of neutron and gamma-ray irradiations on rad-hard optical fiber

Adriana Morana 1 Sylvain Girard 1 Marco Cannas 2 Emmanuel Marin 1 Claude Marcandella 3 Philippe Paillet 3 Jocelyn Perisse 4 Jean-Reynald Macé 4 R. Boscaino 2 B. Nacir 5 Aziz Boukenter 1 Youcef Ouerdane 1
1 LHC - Laboratoire Hubert Curien [Saint Etienne]
2 Università degli studi di Palermo - University of Palermo
3 DAM/DIF - DAM Île-de-France
4 AREVA NP
5 CNESTEN
CNESTEN - CNESTEN
Abstract : We investigated point defects induced in rad-hard Fluorine-doped optical fibers using both a mixed source of neutrons (fluences from 1015 to 1017 n/cm2) and γ-rays (doses from 0.02 to 2 MGy) and by a γ-ray source (dose up to 10 MGy). By combining several complementary spectroscopic techniques such as radiation-induced attenuation, confocal micro-luminescence, time-resolved photo-luminescence and electron paramagnetic resonance, we evidenced intrinsic and hydrogen-related defects. The comparison between the two irradiation sources highlights close similarities among the spectroscopic properties of the induced defects and the linear correlation of their concentration up to 1016 n/cm2. These results are interpreted on the basis of the generation processes of defects from precursors sites, that are common to both γ-rays and neutrons. In contrast, the highest neutron fluence (1017 n/cm2) causes peculiar effects, such as the growth of a photoluminescence and variations of the spectral and decay properties of the emission related with nonbridging oxygen hole centers, that are likely due to silica network modification.
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Journal articles
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https://hal-ujm.archives-ouvertes.fr/ujm-01185827
Contributor : Sylvain Girard <>
Submitted on : Friday, August 21, 2015 - 3:53:42 PM
Last modification on : Tuesday, October 30, 2018 - 5:00:02 PM

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UNIV-ST-ETIENNE | CEA | LAHC | IOGS | PARISTECH | UNIV-PARIS-SACLAY | DAM

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Adriana Morana, Sylvain Girard, Marco Cannas, Emmanuel Marin, Claude Marcandella, et al.. Influence of neutron and gamma-ray irradiations on rad-hard optical fiber. Optical Materials Express, OSA pub, 2015, 5 (4), pp.898-911. ⟨10.1364/OME.5.000898⟩. ⟨ujm-01185827⟩

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